Manufacture and production of erythrene.



UNITED STATES PATENT OFFICE.

GEORG MERLING AND HUGO KOHLER, OF ELBEREELD, GERMANY, ASSIGNORS '10 FAB- IBENFABRIKEN VORM. FRIEDR. BAYER PORATION 0F GERMANY.

& 00., OF ELBERFELD, GERMANY, A COR- MANUFACTURE AND PRODUCTION OF ERYTHRENE.

Specification of Letters Patent.

Patented Mar. 25, 1913.

No Drawing. Original application filed December 6, 1911, Serial No. 664,136. Divided and this application filed March 2, 1912. Serial No. 681,283.

To all whom it may concern:

Be it known that we, GEORG MERLING and HUGO KoHLER, doctors of philosophy, chemists, citizens of the German Empire, residing at Elberfeld, Germany, have invented new and useful Improvements in the Manufacture and Production of Erythrene, of which the following is a specification.

The present application is a divisional application of our application Serial No. (564,136, filed December 6, 1911 and concerns the manufacture and production of erythrene by distilling with a caustic alkali or anearth alkali, the halogen ammonium halogenid of the formula:

halogen halogen In order to illustrate the new process more fully the following example is given, the

parts being by weight:

Manufacture and production; of erg threne from the tetra-ammonium chlom'd:

This ammonium chlorid which can be obtained by directly combining the oxy base:

separated in another suitable manner, the bromoor chloro-ammon1um chlorld:

remains as a thick brown syrup, which is distilled with about three times its quantity of pulverized caustic potash or soda or also with calcium or barium hydroxid with or without the addition of alcohol or water. The erythrene thus obtained is led through dilute sulfuric acid, dried over calcium chlorid and condensed by cooling. The

yield is nearly theoretical.

We claim 1. The process for producing erythrene, which process consists in first heating with an alkali a halogen ammoniumhalogenid having the hydrocarbon radical:

and secondly isolating the erythrene from the resulting mixture, substantially as described.

2. The process for producing erythrene, which process consists in first heating with an alkali a halogen-ammonium-halogenid of the formula halogen halogen 

